In a bowl add flour (3 cups), add baking powder (1 teaspoon), add 180 gr. cold butter. Chop the flour and butter into small crumbs with a knife.
Add sour cream (1 Cup). Knead dough. If, in your opinion, the dough will be watery, you can add a little flour. The dough should be comfortable to work with and easy to roll out into the formation. BUT! too much flour should not be added. Next, place the dough in cling film and put in the refrigerator for 30-40 minutes.
Washed and dried in the oven walnuts chop into small crumbs.
Raisins wash, pour 1 hour to 1.30 minutes with warm water, then dry with paper towel. Connect the chopped walnuts and raisins.
Remove the dough from the refrigerator, divided into two parts, each part roll out to a thickness of approximately 2 - 3 mm. With a knife or knife - roller to cut the crust into squares 7 - 8 cm In the middle of each square put the stuffing of raisins and nuts. Form triangles.
Triangles put on a baking sheet, covered with baking paper and send in a preheated 180-190C oven for baking. Bake triangles until Golden.
Ready cooled triangles sprinkle with powdered sugar.